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The effective resistance in series combination of two equal resistance is ‘s’. When they are joined in parallel the total resistance is p. If s = np then the value of ‘n’ is

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Detailed Solution

$R_{s} = nR; S = 2 R \to (1) R_{P} = \frac{R}{n}; P = \frac{R}{2} \to (2) But S = nP; 2 R = n (R / 2); n = 4$

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